Sheet feeding apparatus for printing presses or the like



Y. A. F. DA'Nu-:L'ssoN 2,566,175 SHEET FEEDING APPARATUS FOR PRINTING Aug. 28, 1951 PRESSES OR THE LIKE ZSheets-Sheet l Filed Nov. 29, 1945 e Q Sms N .TIE

A118- 28, 1951 Y. A. F. DANIELssoN 2,566,175

SHEET FEEDING APPARATUS FOR PRINTING Y PRESSES OR THE LIKE Filed Nov. 29, 1945 l 2. Sheets-Sheet 2 IN VEN TOR'.

' YNGvf 'A1/505C i@fm1/wma DAN/asso Qq ATTORNEYS ia'tenfea Aug. 28,1951

SHEET FEEDINGAPPARATUS FOR PRINTING PRESSES R THE LIKE Yngve August Ferdinand Danielsson,

` Goteborg, Sweden Application November 29, 1945, Serial No. 631,525

lIn Sweden May 31, 1945 2 Claims.

The present invention relates to paper sheet y separating and feeding machines wherein the sheets are separated one by one from a pack and each so separated sheet delivered to a printing press or other machine. and feeding machines are usually provided with a single set of sheet grippers, preferably of the suction type, which are operatively connected together in unison through a system of links and cams to a driven shaft all of which limit the speed of delivery to the printing press and a primary object of the present invention is to generally improve sheet separating and feeding machines of this character whereby the sheets may be delivered in a more rapid manner.

Another equally important object of the invention is to arrange sheet grippers in sets upon a conventional separating and feeding machine and alternate the movement of each set of sheet grippers whereupon as one set of grippers move a sheet forward upon a pack towards the printing press another set of grippers will simultaneously seize or grip the next succeeding sheet of paper upon the pack and in this manner accelerate the delivery of the sheets of paper to the printing press without increasing the speed of the machine or exerting any undue strains upon the system of links and cams thereof.

Other objects of the invention are in part obvious and in part pointed out hereinafter as the description continues.

In the accompanying drawings:

Fig. 1 is a fragmental vertical sectional view of the machine embodying the invention as arranged above a pile or pack of paper sheets and,

Fig. 2 is a detail top plan view of the same.

In these drawings I designates a pile or pack of paper sheets to be delivered to the feed rollers B of a conveyor and which latter in turn delivers the sheets to a printing press or other machines. Extending parallel with the rear edge of the pack I and rotatably mounted in a suitable frame (not shown) is a driven shaft 2 and which latter rotates in that direction of the arrow as shown in Figure 1.

The shaft I has keyed thereto four cams indicated by the reference characters 3a, 3b, 3c and 3d. Whereas, these cams are each arranged upon the shaft in spaced relation the cams 3a and 3d are set at 180 in relation to the cams 3b and 3c. Also keyed to this shaft 2 are cams 5a, 5b, 5c, and 5d and the cams 5a, and 5d are set at 180 in relation to the cams 5b and 5c. The cams 3a, 3d and 5a and 5d have a striking action at the same period of time, whereas the cams 3b,

Such sheet separating H CFI 2 3c, 5b and 5c also strike at the same time, but only after the shaft 2 rotates 180 after the cams 3a, 3d, 5a and 5d have struck or upon each complete rotation of the shaft 2 each set of cams is presented for striking action.

Pivotally supported upon the fixed shaft 'I are four bell crank levers each having a downwardly extending long arm indicated by the reference characters 8a, 8b, 8c and 8d. Pivotally connected to the lower end of each long arm of the bell. crank levers is a bar and the latterare indicatedv by the reference characters Illa, I0b, vlilo and Iild.Y Carried by the outer extremity of each bar is a, suction cup or foot indicated by the reference: characters 9a, 9b, 9c and 9d. Journalled upon the long arm of each bell crank lever is a roller IIa, Ilb, IIc and Ild. A coil spring is connected to the short arm of each bell crank lever and is indicated by the reference characters I2a, I2b,l I2c and |2d which normally retain said rollers in contact with the cams 3a, 3b, 3c and 3d whereby upon the rotation of the shaft 2 an oscillating movement will be transmitted to said bell crank levers and the suction cups connected thereto Connected` to each bar is one end of a link and these links are indicated by the reference characters I3a, I3b, I3c` and I3d. The opposite end of each link is pivotally connected to a crank arm rotatably mounted upon the shaft I5 and is herein indicated by the reference characters Illa, IIb, I4c and Idd. Journalled upon each crank arm is a roller indicated by the reference characters l6a, IIb, Ic and I6d and which rollers are in contact with and ride upon the cams 5a, 5b, 5c and 5d. From this arrangement it is apparent that with each rotation of the shaft 2 an elevating movement will be transmitted to the bars and the suction cups carried thereby.

As the shaft 2 is rotated the cams 5a and 5d will permit the suction cups Ba and 9d to grasp a single sheet of paper upon the top of the pile I and then the cams 3a and 3d will strike the rollers Ila and IId for advancing the so gripped sheet of paper until it assumes the position as indicated by the letter A in Figure 1 of the drawings. As the sheet of paper A is so advanced the cams 5b and 5c will then permit the suction cups 9b and 9c to engage the exposed end of the next sheet of paper upon the pile I and as the cups 9b and 9c grasp this latter sheet of paper the vacuum within the cups 9a and 9d will be broken to release the sheet A. As the sheet A has been advanced between the rollers B the latter will continue to draw that sheet across the pile and deliver the same to the printing press. As the cams 3b and 3c strike the rollers IIb and i I c the suction cups 9b and 9c will be advanced across the pile and at the same time the cams b and 5c will raise these suction cups and the sheet of paper carried thereby until the latter assumes the position of that sheet indicated by the letter A. As the second set of 4suction cups Ais .being so actuated the -rst mentioned suction'cups .fila and 9d' will be moved rearwardly of the pile I under the tension of the coil springs 12a and |211 and at the same time the cams 5a and .5d will again permit the set of suction cups 9a and 9d to engage lthe exposed end of the next succeeding sheet of paper upon the pile I. It will be noted thateach set of suction cups grips a single sheet of -rpaper at spaced position adjacent the rearend thereof and by alternating each set of suction cupssheets of paper may one by one be grasped from a pile and delivered to the conveyor rollers B ina more rapid manner than if only one set of suction cups `were employed and -yet =the rotation .of driven shaft `2 does not have `to be :increased lnor 4will therebe anyvundue strain Von thelinksystem be- ;tween-the driven shaft .andthe several setsof suction cups. Whereas, Ihave shown and .de- `scribed onlyrtwo sets of suctioncups thefnumber of sets/may beincreased vas requirements lvor de- `mandsmay-dictate.

I-claim: Y

1. vAn apparatus for separating .sheets from a stack of'horizontallydisposed sheets andmoving the separated sheets :.across'said stack inquick `successioncomprising a plurality -of :sets of .gripping members positioned above .said stack .of sheets, -a-rotary drive shaft, a groupoi .sets of cams xedly-mounted on said shaft with one set of cams-positioned at an angle of 180D relative to another set-means operable bysaid sets o1" cams for giving'- ahorizontal oscillatory-motion? to.. each set-of grippinginembers in succession, a .second .i

group of sets lof cams xedly mounted on said -shait with one set of cams positioned Vat an angle of 180 relative to Vanother set, means Y operable ibyl sai'dsecondgroupfof cam sets for-giving a ver- Ytical Yoscillatory motion to each set of gripping.

memoersdas they `are moving across said .stack and means for seizing the sheets as they are ad vanced across said stack,

2. An apparatus for separating sheets from a stack of horizontally disposed sheets and moving the separated sheets across said stack in quick succession, comprising a rotary drive shaft, a A.pair of cam `sets -flxedly `,mounted on .said shaft ,with a angle between each set, a plurality of vertically extending bell crank levers pivotally mounted with each lever contacting one of said cams lfor being pivoted thereby, resilient means retaining .each lever -in contact with its respective cam, a plurality of horizontal arms each piv- Votallyconnected to one of said levers, a plurality of.suction cups each carried by one of said arms, a second pair of camsets fixedly mounted on said shaft with an 180 angle between each set and with each set having the same striking position as 'one set of said rst mentioned group of cams, a second plurality of horizontal arms each bearingononefof-said second group of cams, a y.plu- 2ijality of-linkszeach pivotallyconnecting oneof '.saidfrst horizontalarms with'onewof said second heri-zontel erm- `YNGl/E,AUGUST FERDINAND DANIELSSON.

'REFERENCES `ClED .The .following .references are of record in 4the :le of this patent:

.UNITED STAT-Es PATENTS Number Name .Date

.450,447 IBuchwalter Apr. 14, 189.1 768,930 Brostrom Aug. 30, 1904 1,743,734 steel@ Jan. 14, ,1930 .1,777,226 Rockstroh .sept. 36,1936 ,2,649,622 vRanmger July 26, 193.6 1213589'19 .Henry Oct. 27, 1936 v.2,186,652 speiss Jan. 2, 1940 2,394,026 Tyler Feb. 5, 1946 2,406,765 Harrold sept. 3, 1946 2,454,762 Beuuche' N6v.,30, 1948 .FOREIGN PATENTS Number Country Date H236,655 Great Brita1n of 1,925 

